How to set constant pressure for honing tube?

1, off the cutting stage, this constant pressure honing, at the beginning of the hole wall due to rough, the contact area between the stone and the hole wall is small, the contact pressure is large, the protruding part of the hole wall is quickly ground away. Due to the large contact pressure on the surface of the oil stone, coupled with the abrasion of the chip to the oil stone binder, the binding strength of the abrasive particle and the binder decreases, so some abrasive particles fall off under the action of cutting pressure, and the oil stone surface is exposed to new abrasive particles, which is the oil stone self-sharpening.

2, crushing cutting stage, with the honing process, the hole surface is more and more light, and the contact area with the oil stone is more and more large, the contact pressure per unit area is reduced, and the cutting efficiency is reduced. At the same time, the chips cut are small and fine, and the wear of these chips on the binder is also small. As a result, the oil stone particle falls off less, and the grinding is not done by the new abrasive particle, but by the abrasive tip. Therefore, the load of the abrasive tip is large, and the abrasive particle is easy to break and collapse to form a new cutting edge.

3, blocking the cutting stage, continue to honing the contact area of the stone and the hole surface is getting larger and larger, fine chips accumulated between the stone and the hole wall is not easy to exclude, resulting in the stone blockage, become smooth. Therefore, the cutting ability of the oil stone is low, which is equivalent to polishing. If the honing continues, the oil stone plugging is serious and the adhesive plugging is produced, the oil stone completely loses the cutting ability and seriously heats up, and the hole accuracy and surface roughness will be affected. The honing should be finished as soon as possible.